69601661 has 2 divisors, whose sum is σ = 69601662. Its totient is φ = 69601660.

The previous prime is 69601633. The next prime is 69601663. The reversal of 69601661 is 16610696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57912100 + 11689561 = 7610^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 69601661 - 2¹⁰ = 69600637 is a prime.

Together with 69601663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69601663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34800830 + 34800831.

It is an arithmetic number, because the mean of its divisors is an integer number (34800831).

Almost surely, 2^69601661 is an apocalyptic number.

It is an amenable number.

69601661 is a deficient number, since it is larger than the sum of its proper divisors (1).

69601661 is an equidigital number, since it uses as much as digits as its factorization.

69601661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 69601661 is about 8342.7609938197. The cubic root of 69601661 is about 411.3452954331.

The spelling of 69601661 in words is "sixty-nine million, six hundred one thousand, six hundred sixty-one".